SimonSes, i've noticed Herc gear seems to have a higher rate of phalanx +5 augs also, could also be sheer luck but seeing you have more herc +5's than other gear considering the massive dark matter aug pool required to get that amount of +5's, and I do also, maybe there's something in it.
I've been trying to 5/5 Phalanx +5 augs on my merlinic set and I've probably done 10 times the amount of attempts vs the amount it took me to 5/5 my herc set, and I'm still only at 2/5 Phalanx +5's on my merlinic so far, although at least my other 3 are still +4's.
Might still just be the RNG of it all, but was interesting to see you have so many herc +5's too.